<template>
  <el-menu
    class="el-menu-vertical-demo"
    :collapse="isCollapse"
    background-color="#545c64"
    text-color="#fff"
    active-text-color="#ffd04b"
    default-active="/"
  >
    <h3>{{ isCollapse ? "后台" : "后台管理系统" }}</h3>
    <el-menu-item
      v-for="item in noChildren"
      @click="clickMenu(item)"
      :index="item.path + ''"
      :key="item.path"
    >
      <i :class="'el-icon-' + item.icon"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <el-submenu
      v-for="item in hasChildren"
      :index="item.path + ''"
      :key="item.path"
    >
      <template slot="title">
        <i :class="'el-icon-' + item.icon"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group
        v-for="(subItem, subIndex) in item.children"
        :key="subItem.path"
      >
        <el-menu-item :index="subIndex + ''" @click="clickMenu(subItem)">{{
          subItem.label
        }}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>
<script>
export default {
  name: 'CommonAside',
  data () {
    return {
      menu: [
        {
          path: '/',
          name: 'home',
          label: '首页',
          icon: 's-home',
          url: 'Home/Home'
        },
        {
          path: '/mall',
          name: 'mall',
          label: '商品管理',
          icon: 'video-play',
          url: 'MallManage/MallManage'
        },
        {
          path: '/user',
          name: 'user',
          label: '用户管理',
          icon: 'user',
          url: 'UserManage/UserManage'
        },
        {
          label: '其他',
          icon: 'location',
          children: [
            {
              path: '/page1',
              name: 'page1',
              label: '页面1',
              icon: 'setting',
              url: 'Other/PageOne'
            },
            {
              path: '/page2',
              name: 'page2',
              label: '页面2',
              icon: 'setting',
              url: 'Other/PageTwo'
            }
          ]
        }
      ]
    }
  },
  methods: {
    clickMenu (item) {
      this.$router.push({
        name: item.name
      })
      this.$store.commit('tab/selectMenu', item)
    }
  },
  computed: {
    noChildren () {
      return this.menu.filter((item) => !item.children)
    },
    hasChildren () {
      return this.menu.filter((item) => item.children)
    },
    isCollapse () {
      return this.$store.state.tab.isCollapse
    }
  }
}
</script>
<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu {
  height: 100%;
  border: none;
  h3 {
    color: white;
    text-align: center;
    line-height: 48px;
  }
}
</style>
